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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31067caeb253c21af413ef5bbb8a2729d30b8c6be97b492ab0b862dc9c436add' 
  AND token = 'TIk7UdXEhW0cysmpk4JhhlAiC8xJIPGIR06Uytpjrxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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