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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02caf5c9cdaf535f3dc13dc576a4f962dc733bc15f820c65aa8f96e57a1034d1' 
  AND token = 'FWygFfy4IkX+SiuAH35lIWPS2kBk416eV7m5Kl8+dqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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