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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f069bba3f79c78f88b3714efc2db2976233d42f3d1705b45de90da6a63c12e83' 
  AND token = '6Ai/wiS3GvRaykyYjMx2biavQJjiGKauwXC7Z7AA+JM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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