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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '960178f7087ab57c03785b8c8b0923e4fbc953cb08f49636d1140d39c9fc808d' 
  AND token = 'hBINn+d2u+I6xJs6vlClI8q/P7l1d1+8PvgGrQh3Fgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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