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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '617a37ea92ea104c2e3d5e43e77085a4ed75001d0c6ef12cce7d1c71befbb007' 
  AND token = 'sv/vbbWU65OwE/jpKM+kHDVYKpS3Ks/kxMn69Vshzn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}