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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85f3bb1d22e2cb9e2502ba383abbc103ea94853b6cf6472ac24f979b690d99af' 
  AND token = 'wMfNzNuqg3LNx0e2mbXh6z/Cktf1urvStbO2SbCbPnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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