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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2717e502d0ec9a6b622405f2df7a9f324eda0fa90f485617d8334283e7cd51ec' 
  AND token = 'L0o7+Y5j8XLuUrPYTJxHCE+aBZm+/SReTaAqundSdus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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