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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804afaf37ed04e54d3394f64c87f54aa297fdf28469967e2c1a6c55a24c396f2' 
  AND token = 'Y4f9Fa2F22nKwscsC2pEarqH9HzjjzfmWxs4ykGLNc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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