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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95aed3701870b553b6ef2a3b242f94fa19e4874023ca8eb2a4ae7721af5f18df' 
  AND token = 'LYljTMbS8kWoa0keMSTLp6XeTQfPrNhfimIm/96Bu1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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