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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60df64d8a1b5b288be4cbd372bcc6a32f7a8c11fad8855c16bf5864aabcef982' 
  AND token = 'FFgpQbF9f1+Xo73jAaaInmwgIWOmcCjo1CPViG+W1IY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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