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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07ee0c259c0121f04d96679b5fa1628ef5dcafc4ed77e026e094a91e10e4ba9' 
  AND token = 'eRmgrU4bwbBTFsVOyG03zT8udNTAKBeSePSq3fVuvAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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