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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e05d9caa563164048dc8f8f427d6d897b73d160ef69dcafdd05ecb0f3ebabd7' 
  AND token = '+ob+KKK/ovxgKWKwnlsx3QfEF5w3TNZrA+eBLSYsnDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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