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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13fd558ae23bcbcb8cc9b4493eedac2ac7fd670aad06173a59cbdb55d6a80b1e' 
  AND token = 'LvfZx5vEdGkZGfPbU9dBSPwjurk55r9XA5m5P4FYl1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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