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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d85449281edeaa3da5cd902eb4bb222bd40485cc186e5bd446f6d4125336fd3' 
  AND token = '4rTnn85oa95jce0SDb0Vs1yTWewRC2hHECe64ZUUcyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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