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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd95be5fcb24907596fb54b02c1e4cdc237eff1e331eae0c7949424b945b82f' 
  AND token = '//FsfA68U11WDRk9jJuLTpkGvGmWCzr9Hf5NpY4aTTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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