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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65a2deee87a90b3c9c93ac195d172780eead784f47fc3f59bcc2519aac1a06cc' 
  AND token = '5EO8vkZb/8fGOEydWsGWDbZKYDNrpRRHYTkSNRDFHeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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