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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fd07b43845ec1159d7e2d50b6794d5e1c12cda455ebe2f297523d00c73a4b7a' 
  AND token = 'WOmerP9GxU3aSo5nABxwbzr8G2YebdbGuQgbt21+GaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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