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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2abe628cb91a87b8687c46619545654432ed351ef1c11624f4c0d4cc910f48a6' 
  AND token = 'jS22sPvEUCOLBvSsQi55Kl1t9hnjIaJEmk06cfLkvLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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