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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '702a51ba6e282c0fc93ccbc9d5f826209c83223ac66cd4f94f98694b7c17224d' 
  AND token = '55C/X4N31prChmlG1R3xHNAYg7us5sUpMFS+XEgtz+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00114

JSON explain

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