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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'edc75d7b953e098c41a939c7211808b39b0555480446f4c47933db0ea045a6cd' 
  AND token = 'GHoBbWQrdbN7XgK6ygrGmflNsc2JNLKK/4iKPn2xX6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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