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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30e51df9b250ba297ca057445ce0a48a5e54ae631c55fe84aef6fad5ce9fbc5d' 
  AND token = 'izrpHNHcdIz/QQSKYDFRk0L8ursx8M/lgmwvmIek8/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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