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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0ab584cf340ca1a2ecc4cf201be5bfb959ad6f1f4b6c2f544c93c80b0fac6390' 
  AND token = '2wNQo0x0hvI+sX8fA8OWYWVd0nRaK6a1We1GzuJDvM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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