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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '117554e0e8049f404e43651ec19156134987004c99a1a95128e9620cf22cb88e' 
  AND token = 'KUfljjCn0kB47cMvkiPptWAAKQ275Pk+LNVTRCzasVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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