SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70242a22cc8b3139ec5405ad4b237f1e603c6fe3e5bbe4fbb99e087d6a741fc5' 
  AND token = 'BbZT85h8yuQz4aBNXYr8vAGhmWqP8cJnPzxKVsqmvA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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