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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ec84212d523b82d92b4cbd60daf28c7bbf3d7bfcf92e6bf952815e3ffd227c04' 
  AND token = '6EwFu+/rJG3jEdujG+1MIyxiWQx7c6qu+tsLD5u8wus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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