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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22866627516241c3f1794072a7c564c36995089da0317262028e460de9d9c921' 
  AND token = 'BDYPZ3y8wT/igsXpAbLf2rBonzOpdgyyuSlfu6JNQX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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