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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2d953b3741042175a33a14b7ba7419dd9de8a616a81839236d82f7848137ba9' 
  AND token = 'CZEA12mQ/KxARXOAmFb+obfaH9Ggm8UqQ21Ot3JM+7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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