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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd97c86437a5f839fc2fed5fd7aa3db20049a01e3b34705c52e6fe320e051b1f' 
  AND token = '9hsnWa0l1WnTFq46hYH0OP+dz5fyNUOqNqi4eColM4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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