Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a9ca26c35839e72e08cfbad80435bbbde93552ef0f85c25cd0a22723d3c3cb5' 
  AND token = 'nkaXP/Nt0yyXSQxX8i3q1j5tsxl8uf+rNprePG3BNEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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