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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c097d818cc1c042714912504a344c967e50112c5df33566fc1be2938362ac1' 
  AND token = 'W2JB8qZBgi4S13C3EUU5QPN+JK9sfLlyG/i6mjotik4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}