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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18f2ac99f55a5573077e2d30d7ab4f09c1cec1f12657c58f045f5c787ab14b88' 
  AND token = 'JBD/5xYuG+QBIY+q8E4a1/EVfN0h3ROD6q0YOPh1b7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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