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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eeac20d5e950ce8498e55c2abcae9675eab536d015d64cdecd6a204d63e1ce0d' 
  AND token = '1qVHJhmQm3QWeoH2ftzlE99NFg6ReoTd3yU8rmBUrlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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