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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '962d6b6e88e9413531cb8439cac3e06c9775c3678445178c2870d1a61c2242bb' 
  AND token = 'Kdb2WhD4R1gVq0wdtveLH+K0gYGwWIOkw0Ot4Y6Girw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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