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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47cb1bea4725573ade7b95ab4a7aa7802e70a2a16f91c9ddf53cbad63d7c6e11' 
  AND token = 'q1KaR4gxe5e3ynXkQ1Ux5bv3AaumwQYx/Jmgf8AON3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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