Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b13c77703f0a6b0e1545255ae4e37d3a63c08182c74c270fea2d168249321263' 
  AND token = 'wKwK5BwmTpmwVq/cJ1ZniqEVZqgwRJt8PA3z3Nm7i6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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