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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e77e2ae9f707fc72ff2ec1ebc536e52025c261eba37dcdc2604c9da9e4de3354' 
  AND token = 'm1otuEJ6F/FfN7bRwJ+IWQvX2qWyPZNq3W+aBNp5vI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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