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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d65b361a26a20069763984c1a070f337ad7c33d550aadd763740be43b74a70b' 
  AND token = 'XkbzXXP7J4Kz8U7oMDTVnXad2G/FzRinBEK9c1c/798=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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