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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6bb0a730118e4670ba3b244d8127df68cf671f5b3ac7b1918a23e77c72b0537e' 
  AND token = 'Yt2maA+4qNI263wn0bLhEcUguc2xd72xKRCH7MhiPFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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