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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd886ea408a37e3e13a810e60e8e58d89746ef7b5768c18508f86c0f1c07c8abb' 
  AND token = 'jp02s3C7RIY7mTBcxK127bdwulwkCpZmit3c/YZKB4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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