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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe2bde9c7c0407734092ef111909b471d5ad998ef03e4143bfeab7b5e7646ab8' 
  AND token = 'M02Dq7OQszS8og4SNgtcCdptLGrt6dBrUVVYm2moDyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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