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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e405b470070a3f52ae36521c742cd4cffdad6223acf04f447d7b9605d4e8154' 
  AND token = 'ai051jra0AISUhOCs7sjYh2fNbK70cvsEJ/eTteFpF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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