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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff7b4d99866d3187a8005118e2acad84cd77a2e83e8fe951be3d93b45684dac1' 
  AND token = 'jwOsncPknknLhF8yikXnTPWY1A3rCbUHvcfiflgfx7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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