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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '230857549eb352024714486c0c1a88c1fc65e66b479d1a0b9913b8ff216225be' 
  AND token = 'LuTGTGaSJZjktqaecW3tplHENg5G2KB0boLpLWukURA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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