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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7d3b8d20cf2e3dfeddc32b5eb72ec6070a5254da58e752e09f416124339fe0c' 
  AND token = 'A0V2E+P9S+PxDV+0U3d2NuV5WkRtCdizZpq+bqtD174=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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