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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfb54ac3a80c1c1657580b3c6c714db128d8463df615babec79aee01c40bfb3a' 
  AND token = 'LJ/3/EMJc92w3Tl7r+zfj3It3fGpy2awMyQYgVM6jXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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