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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb74331815ba4571d810111a12ac19e79466292f00d581465ed8078ea1fd4d74' 
  AND token = 'KNKaTEAo4y/b0yDxMSfgdYN8SlwEa8UMGl8U2dN6Xks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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