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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd31188613aab5c853e7e0bd8ce09f3e27f85ae06827f9f95f752200e9a9909cf' 
  AND token = 'eibejdmvXl9wKWGBTEhgvapQVrp8LFWoRaFfTcvuXcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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