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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6da5dde835f207c989da078107b7b0095d4c5a3161d5ad93e0491c84adb91987' 
  AND token = 'bgyMpK9sIH/8Hrpu6tti9u6rkY8yE6fZmsUFoarz684=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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