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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e41edabaa83c6b4adb7ad69b4cb61cf6ba65beef3eecade41aaa76fb92201b39' 
  AND token = 'Cno+gSHwyc4w1JS17TcM513/obCGVFZ0V4+AfSul+7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00143

JSON explain

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