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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d55494b963f38485bc9d38044b5e794e68f279dc95ecc961103975e54d5b145' 
  AND token = '+Cm3/54o79wtXX+2bclXSFP/TEMI1zVehXRm8a2UCnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01195

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}