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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f879f4e4aed0a4be5fde981b05cd729b298d21c041386253488a89eda9f4784' 
  AND token = 'YNzBeNUmMgX7CiuKqXtl2bfMSLsb8VBUEmg6/st/g/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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