Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23cf12ae983a2fd0749cf16f6aebef868ff626bb753e87e60ffda540674a016c' 
  AND token = '8cHzhv+bLeX1NQyvw20OukJPU2LPX7Fh9+XQ73R5oog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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