Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d32a516bb678d88f81399981f0f035afcbb880a86657eb36efd58100a6fce5c' 
  AND token = 't/dvGr9TOLjb2zfuIs81Xhhanp7tVAmq2jdO3vLofUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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