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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37d5c1313dc96f9b1b35cf42a467fbba37c62eec01d2cf27eb45df9ae92092cc' 
  AND token = 'bbmCPxqmms/ZEc9gtUG12KogPAYC9QKOGjMXAE5Gfjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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