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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e62ded4cfadfedb56bc2236b33ca37357e46de260e9d6e54c4124d4e5ba1b2c' 
  AND token = 'LW8lMhF6eOZ56jULtmLh1F1S0dQaGPp+xf1TFog85EI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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