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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a407dfd864f83c063f878f4b935de258d52a6f532fca9b2b22811fe77942e59' 
  AND token = 'bydUZe3THl1161JjQyJCmlg7dOecCXSg1V6ls7LSMJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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