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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8933b4b973042cb51bcd27bf029dd3dc2d1ed6f9e9cb24330f25b9c7d8de8cdb' 
  AND token = '+CuRmFZvGH4JeFscRQQR64wuC02ukIefBYgqMBWu7zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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