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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f35d4b28e7183fe67f5055aae9b378e940441d1f8ac44d8cfdbe157101ad51e' 
  AND token = 'SoQxTTxhzHA3qd5quaI9Z5/RruYgqbtQsI4+Rynev3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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