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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdb64362f27155bb70a228bedefa18f762b3752c0e7bf73f43d165056def5dac' 
  AND token = 'w2qau73qlt5o+WxjYmqgmsMJET9Hs6R5LGaHAC+H/6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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