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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0d1073376a831fe1f8d2baedf50023c07d38c9f7bbb6286f77807b243b8451f' 
  AND token = 'rSCD8XDNSOniKaZnTG4v/YaWFl2SIe2C4ITc4bdWXK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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