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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32b4d8deb7abbeb85ecf6f74d5042692bdde1b5dc90c1c4da62c530626cf0232' 
  AND token = 'wBy9KeAlrm7rpSyQngRbhVVdXNf3Q0dL21q//hzQ4Zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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