Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd8406c4fcf1f2462b0633cc02d95b1dbf1b57cac984801fd0617e557b8fe3f' 
  AND token = 'CTO6SU5BVGSc1tlrPgePFSR1511IbXROEsx49yLFTi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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