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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '746923b9696237a56c44d9acdf56862e9d39f8bfe9f0dfb82396b2439da1698d' 
  AND token = 'tVXqEmn8W8EPlUW2nMKHh6tPVucEOmJKrUE1VeHCjjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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