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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a760325cbf2a4f42542f9078ac8eb136f32697ade9f0e17aa98fd3f68462e29d' 
  AND token = 'EaVyHvomEEMeq/YPHrEWBCaWOm4mZQ6G5Cjbn+tIxag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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